My "new" wide angle lens

How to use fisheye like normal wide angle lens.

I decided if buy prime wide angle lens, but there are only expensive lenses smaller than 20mm or also expensives zoom lenses.
My idea was what if I use profile correction for my Canon 15mm lens and create photos which looks like shooted with normal wide lens.
It works! Canon 15mm is super sharp with f/5.6 with only little blurry edges.